html5 is not available in all browsers as of now. I say we include flash and/or silverlight in the package and let the admins choose the preferred framework. It is just a matter of including a string in it's configuration.

@fyorl, I had made a branch on github for this project, will update it with some more commits, you can dig up from there. And I suggest you do not use the plupload github source, but their stable release package.